Remote Code Execution Vulnerability in Microsoft Office SharePoint
CVE-2026-88166

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Sharepoint Server Subscription Edition
Vendor
CVE Published:
13 October 2026

What is CVE-2026-88166?

An integer overflow vulnerability in Microsoft Office SharePoint permits an authorized attacker to execute arbitrary code remotely. This flaw can be exploited over a network, potentially compromising sensitive data and system integrity. Organizations using affected versions should prioritize applying the latest patches and security measures to safeguard their environments.

Affected Version(s)

Microsoft SharePoint Server Subscription Edition x64-based Systems 16.0.0 < 16.0.20326.20190

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.